The large eye of the special swivel creates very little friction greatly enhancing bite indication, the small lead link and silicone sleeve combine to form a very neat, tangle free system. Can be left on your rods minus the lead in between sessions.
The ring swivels have been designed to create a strong hinge in any hooklink. They are very effective when using stiff pop up rigs. The non reflective finish to the swivel helps with rig concealment which helps keep your rigs hidden from wary feeding fish.